Manhole cover



March 22, 1932. A l.. GscHwlND 1850v455 MANHOLE COVER Filed Sept. 9, 1929 Patented lidar. 22, 1932 narran stares LEON GSCHWIND, OF YOUNGSTOWN, OHIO iti-Annota cover.

Application tiled September The main object of this invention is to provide a man hole cover for street use in which the cover is effectively locked in position and at the same time may be quickly released or secured.

A further object is to provide a man hole cover embodying these advantages which is economical in its parts and at the same time strong and durable and not likely to become inoperative in use.

Objects pertaining to details and economies of my invention will definitely appear from the description to follow. The invention is defined in the claims.

A structure embodying the features of my invention is clearly illustrated in the accompanying drawings, in which:

Fig. 1 is a. fragmentary view ot a structure embodying my improved man hole cover on line l-i o' 2 and 3.

Fig. 2 is an inverted view of the cover.

Fig. 3 is a plan view of the cover.

ln the embodiment illustrated 1 represents a man hole such as employed for sewage, water systems, electric conduits and the like. 2 represents the paving of a street.

The cover body member or support 3 is mounted on top of the man hole and is provided witli an internal annular liange 4 forming a seat 5 for the cover G. The edge of the cover in the embodiment illustrated is beveled on the outer wall of the seat and the member 3 is correspondingly beveled or tapered.

The cover 6 is provided at one side with a. retaining lug 7 dapted to be engaged with the seat flange el. Opposite the lug 7 is a depending bolt supporting lug 8 having a hole 9 therein. intermediate these lugs 7 and 8 are depending ears 10 carrying the supporting pin 11 for the bolt 12. rlhis bolt is slidably supported in the opening 9 of the lug 8 and by the pin 11 so that it may be projected into locking engagement with the flange l as shown in Fig. l, or retracted to release the cover.

The bolt is provided with oppositely disposed inclined cam grooves 13 engaged by the inwardly projecting lugs let on the arms ot the link-like actuating member 15. This 9, 1929. Serial No. 391,211.

member is arranged through spaced holes v16 positioned centrally of the cover so that the lugs engage the cam groove and an upward pull on the actuating member will retract the bolt and a downward mov-ement thereof will project the bolt.

The cover is provided with a recess 17 into which the actuating member collapses. The linger hole 18 opens into the side of this recess to permit grasping or the engagement of f a tool with the actuating member.

r.he cover has a peripheral notch 19 in alinement with the bolt to Jfacilitate removal of the cover.

lllith the parts thus arranged the cover is securely locked in its closed position but may be easily and quickly released. The actuating member lying within the recess is protected from traiiic and the accidental retraction of the bolt prevented. Y

l have illustrated and described my improvements in an embodiment which I have found highly practical. I have not attempted to illustrate or describe other modilications or adaptations which l contemplate as it is '7 claim as new and desire to secure by Letters Patent is 1. In a man hole cover, the combination of an annular body member having an internal annular flange providing a cover seat, a cover provided with a flange engaging lug at one side and a depending bolt supporting lufr having a hole therein at the opposite side and a pair of intermediately positioned depending ears provided with a bolt supporting pin said cover having spaced centrally positioned holes, a bolt provided with oppositely disposed inclined grooves slidably supported by said bolt supporting lug and ears, and a linklike actuating member arranged through said holes in said cover so that it may be grasped for manipulation from the outside of the cover and having inturned lugs on its arms engaging said grooves in said bolt whereby the bolt may be projected and retracted by raising and lowering said actuating member.

Y 2. Y In a man hole cover, the combination of arbody member provided with a cover seat, a cover provided'with a retaining member at one side, a bolt slidably mounted `on theinner sidenof the cover to engage the body member opposite said retaining lug, said bolt being provided with an inclined cam, vand an actu'- vating vme'niber "arranged through said cover so that it maybe grasped for manipulation f6 from the outsideof said cover and engaging cam Vwhereby the bolt may be projected "or retracted by the raising and lowering of Asaid actuating member, the cover being pro? vided With a recess adapted to receive ysaid 15 actuating member when in bolt projecting position. f

In Witness whereof I have hereunto set my hand.

' LEON GSCHWIND. 

